Continuous variable web-feeding mechanism.



' No. 886,280. A PATENTED $3.25; 1908.

commuous VARIABLE WEB FEEDING MECHANISM.

APPLIOATION FILED OOTA 1907.

Snow mar;

X, mounted in stationary bearings on the sldes of the main frame A. The cylinder "t, is adapted to co-act with a type form or printing surface (3 on bed B, and cylinder 1 to co-act with a form r on bed B, described in my aforesaid patent. The cylinders and impression and printing.

beds act only durin one stroke of the beds. i t h preferably wlule the beds move irom the;

center outward;- and during the return or inward stroke. of the beds the impression is thrown off by partially rotating the eccentric boxes X, which may be pivotally connected to a bar which is connected at one end to the upper end of a lever Y, pivoted on the main frame. The lower end of the lever Y being cormected by a rod Y. to a lever T,

carrying a, roller 25. engaging a race cam s on fonc of the ears G or its shaft as shown.. Z5 7 7 This cani is so proportioned and constructed that the cylinders will be thrown on or off impression at the proper time.

The web in feeding devices preferably comprise a roll X and co-acting tapes Q, which pass over a series of guide rollers a, and are. driven by frictional contact with ,the periphery of roll X. The delivery devices comprise a roll 1 and co-acting tapes It, passing over guide rollers 1', as shown. The rolls P and N, may be driven at like peripheral speeds by means of a train of gears p, as shown in the drawings. The web passes from a roll J, at one end of the machine between roll N and tapes Q, and then up over a fixed guide 0, between the left-hand cylinderi, and left-hand bed B, u over a guide 0, back over a guide 0 down ettween the lefthand cylinder 'i and left-hand bed B, then up over a guide 0, back to and over aguide 0*; then down between right-hand cylinder i and right-hand bed B, then up over guides 0" and 0, down between right-hand cylinder '4' and bed B, then up over guide 0 back to and between the delivery roll P, and tapes R, thence it passes to the folding mechanism, (not shown). will be printed on one side by the left-hand bed and cylinders, and then will be printed on the opposite side or perfected by the right hand bed and cylinders, and that during the printing strokes the beds move in the direc- It will be seen that the web I The pitch'lines of the gears Y and Z, have such an outline however as to 1m art a peripheral surface speed to the roll X, equal I practically exactly to the speed of the beds atall times when the cylinders i, 'i are on Upon the return or non-prmting strokes of the beds, the impression cylinders are lifted off impression and the web is fed forward to bring proper portions thereof into positions to be printed by cylinders i, i on the next printing stroke of the beds. The web does not have to stop at any time nor is its motion reversed, because,assuming that each form is seventeen and one-half inches in length, (including margins),-thirty-five inches of web must be fed forward during each reciprocation of the beds. The beds however, only move during the actual printing operation seventeen and one-half inches, (less margins). And during this time the gears 1', Z, are so proportioned that seventeen and one-half inches of web (less margins), is fed to and between the beds and cylinders. During the time that the cylinders are clear of the type (i. e. from the end of one actual printing operation until the beginning of the. next),the remaining seventeen and one half inches of web (plus margins), is fed forward between the beds and c 'linders and obviously this much of the we) can be fed at any desired speed; therefore I prefer to feed it at a substantially uniform speed, so shaping the gears Y and Z that there will be no abrupt change either at the beginning or end of a printing ope 'ation. Thus I am enabled to keep the web continuously moving through the press; and to have it move in exact uniformity with the exact motion of the type during printing; and to dispense with any looping rollers, or other movable sim )lifying and improving the construction of t e press.

The diagram Fig. 3 shows the relative position of the bed when the cranks are in various positions. a, b, e, (Z and c represent the positions of the crank pins on the gears t and a, I), c, d and e---the.pos1t1on of the tion that the web travels in passing from the crank motion of the bed, l preferably em- Between the polnts b and d the impresslon )lo irre ular "ears 1' and Z the "ear Y y b I! 1 h being fast to the shaft of roll N, and its complemcntal gear Z being fast to the shaft ofone of the crank gears G.

These gears i 1 Y and Z have the same number of teeth so lugs b on the beds. When the crank pins are at u and c the beds are at rest but between these points they move at an ever varying velocity, being greatest when the bed is'at C and the crank pins are at c.

cylinder is in contact with the type forms am the web of paper must travel at each instant with the exact. speed of' the beds. Part of the periphery of the gears Y and are proportioned so as to give the required speed to the circumference of the roll N while the crank pins move from Z) to (Z, and,

eries are so shaped that Y will eee,sse

notice therewith, a roll for continuously feeding toe wch successively oetween the bed and cylinders both during the after impresssion, one cylinder printing part of the Web skinned by the other cylmder, and means for luring said feed roll so as to move the web in exact uniformity with tref-Tel of he hedduring' the actual printing operations and to feed 2, like quantity of web on lnrnstrr ie of the bed, and means for throne 'inpression during the remzrn slrelze ied.

priming press, the comhinetion of e reciproe: 1g bed, pair of stationery cylinders acting therewith, means for directing e eel) between the bed and cylinders, one cylinder printing parts of the Web ,ped by he other cylinder, a feed roll, and. i for operating said feed roll during the e sting stroke of the bed to feed :1 length of Wei: heiweeo the had and cylinders during the printing st a speed conformable to that of the my 6 or printing surface and thereafter to feed a like lengtn of the web between the and cylinders at varying speed during the return stroke of the bed While the impression is ilnown oil.

3. .ln printing bress, the combination of n reciproeeiing lied, a pair cylinders co- "iicting therewilh, one cylinder )rinling part of the web skipped by the other cylinder, means for directing a web successively hetween the bed end cylinders, web ceding mcchsnisxn, a Web del ery mechanism, and means for epei'oliing we feed and delivery V mechanisms to pass a lenglh of (h s web heiegz the pr:

tween the end cylinders at, s speed uni form with that of the travel of the heal durling operation and to pass a coricsponoing ileng'rh of "Ol) between the hell and cylinders idler eech printing operal'li'm.

l. in a printing mess, the combination of e reeiproczzting hen, :1 pair of cylinders coacting with forms thereon, means for leading a'weh successively between The cylinders and the bed, a roll for continuously feeding a web so the press, irregular gears whereby said roll driven at a variable Peripheral speed so lo feed a length ol' we.) between the lied end cylii'iders ill a speed uniform wile lhst of he travel of printing oricrnlions and to lend a like length the remaining of ilie rev- Y the heal during film 5 fioliii. 7 ess, the combination of sreciproeeting bed, a pair of cylinders coa of web between the bed and cylinders while the impression is thrown off, one cylinder priming of the web skipped by the first cylinder.

.ln s printing press, the combination of pair of beds, means for reciprocating them in opposite directions, e pair of cylinders eog wish each bed, means for directing a Web sneeessively between the cylinders and beds, means for feeding a Web to and from the press, and means for ogemting the feed and delivery devices at an irregular or vari able 5 eed so as to feed a, length of Web throngs the press during impression at s speed uniform with that of the move cm of the type beds and then to a like length oi Web between the bed and. cylinders while impression is thrown off.

printing the comhinetion. of 1 1 oi beds, means for reciprocating Eh-em, pen: of cylinders shove and cemctmg with each 0' l'he beds, means for directing Welilor feeding e Web to and from press, and means for operating the reed and delivery devices at irregular speed so as to feed a lengeli of web through during pressioo at a speed uniform with the; of the movement the type beds end then to feed a like length of "Web between the beds and cylin d While die impression is thrown oil.

7. in a printing press, the combination of e pair of type beds, means for reciprocating he beds in opposite directions, cylinders above and (ac-acting with the beds, means for directing the Wee successively between the beds and cylinders, a web feeding mechenisin comprising s IQll and ce-acting tapes, a delivery mechanism, arr Between the feed and delivery meclie ism to drive them uniformly. an irregular gear for driving said feed mechanism st speed corresponding with :Zhelu of ills movement of beds during the pin ting; operations, whereby e length of web n and cylinders during the priming sperm lions at a speed conforn'iable to that of the printed on the opposite side; e weh feeding mechanism comprising a roll and co.acting he led hetween'il e beds tapes, a delivery mechanism, gearing be- I the beds and cylinders between printing optween the feed and delivery mechanism, an I eratlons whlle the 1m ress10n 1s thrown off. irregular gear for driving sand feed roll at a Z In testlrnony that clann the foregoing as peripheral speed corresponding with that of E my own, I aflix my signature in presence of 5 the movement of the bed during the print- 1 two Witnesses.

in 0 )erntion, whereby a len th of Web ma i v mi fell between each had and its eylinder s PAUL FLEMMING (luring the print 1;; operation at a speed Witnesses: eonl'ornmhle to that of the travel of the bed l JAMES R. MANSFIELD,

10 nhrl it like length ol weh may he fed between i GEO. M. BOND. 

